Door-check.



J. CLREGAN.

DOOR GHEGK.

APPLICATION FILED JANJ?, 1911.

J. c. RBGAN.

DOOR CHECK.

PPLIQATIQN FILED 1111.17, 1911.

1,003,653. l Patented Sept. 19,1911.

2 SHEETS-SHEET 2.

WIT SSES l (d, A Homey Unir srafrns armar crricn.

JOSEPH C. REG-AN, OF STANFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWNEMANUFACTURING COMPANY, OF STANFORD, CONNECTICUT.

DOOR-CHECK.

incassa.

To all whom it may concern:

Be it known that I, JosnPI-r C. REGAN, of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and usefulimprovements in Door- Checks; and I do hereby declare the following tobe a full, clear, and exact description or' the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to an improvement in door checks, and is designedparticularly as an improvement on the construction disclosed in mypending application No. 592,710, filed November 16th, 1910.

rllhe object ot this invention is to provide the construction disclosedin the application above referred to, with a valve and coperating portsfor regulating the closing speed of the door, so that the door may closewith a regular even motion from the start to the finish, or may have aneasy and rapid movement at the start and be slow and under control atthe finish.

l/Vith this object in view my invention consists in the parts and'combination of parts and in the details of construction as will be morefully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in plan of my improvedcheck and closer, the closer spring and cap for the spring chamber beingomitted. Fig. 2 is a view partly in elevation and partlyin verticalsection. Fig. 3 is a view in vertical longitudinal section through theoutlet and inlet ports. Fig. 4 is a view in transverse vertical sectionthrough the liquid chamber showing the valve and Figs. 5 and G are viewsof the valve.

1 represent-s the piston chamber or cylinder, and 2 the chamber for theclosing mechanism. These chambers are cast integral and in opencommunication with each other as shown in Fig. 1 for the passage of thespindle 3, which connects the closing mechanism with the piston 4 of thechecking mechanism. In the assembled device the spring and liquidchambers, are separated and cut oli from each other by a packing nut(not shown) which serves as a bearing for the spindle 3. This piston isprovided with two heads 1a and 1b both of which are without valves, andthe piston is connected intermediate the heads, with the pinion onSpecification of Letters Patent.

Application iled January 1*?, 1911.

Patented Sept. 19, 1911. Serial No. 603,156.

the spindle 3; it is reciprocated by the spindle, and operates tocompress the liquid in the cylinder or piston chamber, by one head ta,when moved in one direction, and by the other head 11b, when moved inthe opposite direction.

rihe cylinder is provided near each end with a port 5 leading from thepiston chamber or cylinder to a compression chamber 6 formed in the sideor rear wall of said cylinder, and each compression chamber is in directcommunication with an inlet port 7 and is also connected with an outletport 8 by passage 9 both of which ports 7 and S at each end, are formedin the wall of the cylinder 1 one above the other as shown. These ports7 and 8 extend toward the center of the cylinder 1 and open into thelatter near the center, the construction being such, that the inner endsof both. sets of ports will be open or uncovered throughout the strokeof the piston.

Located within each compression chamber 6, is a ball valve 11, adaptedwhen the liquid is under compression within said chamber 6, to be movedto its seat, thus closing the inlet port 7, and compelling the liquidforced intol the compression chamber 6 by the approaching piston head,to pass around to the back of said head and into the liquid chamberintermediate the piston heads through passage 9 and port 8, this escapeof the liquid, being controlled by the screw valve 10. When the pistonis moving, say in the direction indicated by the arrow in Fig. 2, theliquid in front of the piston head 21@ will be compressed and forcedinto compression chamber 6 through port 5. rThis compression of theliquid in chamber 6 will cause ball valve 11 to seat itseli:l and closeinlet port 7, thereby compelling the liquid to escape through passage 9and port 8. As there is no compression of the liquid at the opposite endof the cylinder, adjacent head 4b during the compression movement ofhead 11a, the ball valve 11 adjacent said head 4b falls away from itsseat as shown and permits the free and unrestricted passage of liquid,in the liquid chamber intermediate the two heads, to the cylinder infront of head 1b. This provision for the tree escape of liquid frombetween the two heads, prevents any compression of the liquid at therear of headta by the head 1b. During the return or reverse movement ofthe piston,

the liquid in front of head 4b will be compressed thus closing ballvalve 11 at the right hand of Fig. 1 and opening the valve at theopposite end.

Each screw valve l0 is mounted in the cylinder casing at the rear asshown in Fig. 4, and passes downwardly through the outlet port 8, andinto a recess 10a in the partition intermediate the inlet port 7 and theoutlet port 8. The recess l()a communicates with the cylinder l throughpassage l0D which latter is so located with relation'to the cylinder l,that it will be closed by the movh ing piston before the door comes to aclose, thus causing all the liquid to pass around the screw valve andout through the open inner end of the outlet port S during the latterpart of the closing movement of the door. The screw valve 10, as shownin Figs.

l2, 5 and'G, is provided with a groove 10c in the plane of the outletport 8 and may be caused to register therewith so as to Open the outletport by the proper manipulation of the screw valve.

When the screw is turned to carry the groove l()c crosswise the outletport 8 as shown in Fig. 2, the port will be completely closed, and byturning the screw more or less, the groove will be turned so as to permit the passage of the liquid around the valve, thereby regulating to anicety the passage of the liquid through the outlet port.

`'The lower end of screw valve 10 rests within the recess 10a and isprovided with one or more slots l0d through which liquid may pass fromthe recess into the outlet 8. This slot is so located with relation tothe groove 10C, that when the groove is in One position to permit theescape of liquid around the screw valve, the slot 10d will also be in aposition for the passage of the liquid through same and out through thepassage 10b.

The valves 10 may be screwed down so as to fully close the slot 10d andconsequently the passage 10b, and by slightly elevating the valve, theupper end of the slot 10l1 will be uncovered thus permitting a portionof the liquid to pass through passage 10b into port 8 and then into thecylinder near its center. This turning movement of the valve also turnsthe groove 10c so as to permit of the passage of the liquid through theoutlet 8, around the valve 10. The volume of liquid thus escaping fromin front of the piston is regulated by the position of the valve 10.Assuming that the piston is moving toward the left and the valve 10 isso adjusted as to allow the liquid to escape through the by-pass orpassage 10b into the cylinder l, and also around the valve through theoutlet, the 'pressure of the liquid against the ball'valve 11 will closethe .inlet port 7 thus preventing the escape of any liquid through thelatter. During the first part of the movement of the piston the liquidwill freely escape through the bypass or passage 10b and around thevalve 10, so that the first movement of the door will be easy and rapid,but when the piston reaches and covers the passage l0", the only escapefor the liquid from in front of the piston will be through the outletport 8, around the valve 10. rlhe escape of liquid through the outlet iscontrolled by the position of the groove l0, hence by turning the valvemore or less, the escape of liquid around valve l0 can be increased ordiminished, thus increasing or diminishing the closing speed of thedoor.

By turning valve 10 so as to carry the upper end of slot l0d below thetop of recess loa, the valve may then be adjusted to permit of theescape through groove 10, around the valve, without any passing throughpassage l()b and thus secure a regular and even closing movement fromthe beginning to the end.

From the foregoing it will be seen that by the single valve 10, theescape of liquid through the by-pass and also through the regular outletcan be positively regulated and controlled.

llVith this construction it will be seen that Jthe pistons may bechecked or controlled in both directions by adjusting the screw valvesso as to restrict the passage of the liquid from the compressionchambers through the outlet ports, or the screw valves may be soadjusted as to allow free flow through `one outlet port and restrict theHow through the other, thus permitting of comparatively free movement ofthe piston in one direction, as in opening the door, and a checkingmovement in the opposite direction.

The compression chamber adjacent one end of the piston chamber andcommunicating with same, inlet and outlet ports connecting saidcompression chamber with the piston chamber in rear of the lat-ter, anautomatic valve for the inlet port and a screw valve for the outletport, are shown and claimed in my application Serial Number 592,710,previously referred to,

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described without departing fromthe spirit and scope of my invention. Hence I would have it understoodthat I do not wish to confine myself to the exact construction andarrangement of parts shown and described, but,

Having fully described by invention what I claim as new and desire tosecure by Letters-Patent, is z* l. In a door check, the combination witha cylinder and a piston therein, of a compression chamber adjacent oneend of the cylinder, a port connecting said compression chamber andcylinder near said end, an inlet port and an outlet port connecting saidcompression chamber with the cylinder in rear of the piston head, anautomatic valve for the inlet port, a by-pass leading from the cylinderto the outlet port and adapted to be closed by the piston during theclosing movement of the latter, and a single valve in the outlet portfor controlling the escape of the liquid through said outlet port andalso through its bly-pass.

2. In a door check, the combination with a cylinder and a piston havingtwo heads, of a compression chamber in communication with the cylindernear each end of the latter, two ports connecting each compressionchamber with the cylinder intermediate the piston heads, an automaticvalve controlling one of said ports at each end of the cylinder, aby-pass connecting the other of said ports with the cylinder and adaptedto be Closed by the piston during the closing movement of the door and avalve in each outlet port for controlling the escape of liquid throughthe latter and also through its by-pass.-

3. The combination with a cylinder, and a piston having two heads, of acompression chamber at each end of the cylinder and communicating withthe latter through a port located adjacent the end of the cylinder, aninlet port leading from the cylinder near the center thereof to eachcompression chamber, an outlet port leading from each compressionchamber to the cylinder near the center of the latter, a valve in eachcoinpression chamber and operated by the pressure therein to close theinlet ports during the closing movement of the door, a by-pass leadingfrom the cylinder to each outlet port and a screw valve in each outletport for controlling the escape of liquid through the outletport and itsby-pass, the said compression chambers, ports and by-passes beinglocated in the side wall of the cylinder.

4c. In a door check, the combination with a cylinder and a double actingpiston, of a compression chamber at each end of the cylinder, a portleading from said cylinder to each compression chamber, an inlet portand an outlet port communicating with each compression chamber, eachoutlet port having a recess in its wall, a by-pass leading` from thecylinder to each recess, and a valve for each outlet port, each valvehaving` a grooved side for the escape of liquid around the valve and aslotted free end for the passage of the liquid to the byepass.

5. In a door check, the combination of a casing having two ports, and asingle valve controlling both ports, whereby the opening through bothports may be adjusted to regulate the flow therethrough, or either maybe opened and the other closed.

In testimony whereof, I have signed this specilication in the presenceof two subscribing witnesses.

JOSEPH C. REGAN.

Witnesses:

SGHUYLER MERRITT, H. J. LAMBORN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

